The message posted twice bug in my case was caused by having the plugin in the plugins folder twice. Go into plugins and delete ServerAdvertisement.smx. There should also be ServerAdvertisement1.7.smx. Leave that one, it worked for me.

The message posted twice bug in my case was caused by having the plugin in the plugins folder twice. Go into plugins and delete ServerAdvertisement.smx. There should also be ServerAdvertisement1.7.smx. Leave that one, it worked for me.